public class Exam3_7 {
	public static void main (String args []) {
		int sum=0,i,j;
		for (i=1;i<=10;i++) {
			if(i%2==0) {
			continue;
			}
			sum=sum+i;
		}
		System.out.println("sum="+sum);
		for(j=2;j<=5320;j++){
			for(i=2;i<=j/2;i++){
				if(j%i==0) 
				break	;
				}
			if(i>j/2) {
				System.out.println(""+j+"是素shu");

			}
		}
	}
}
